16155873796969 has 3 divisors (see below), whose sum is σ = 16155877816407. Its totient is φ = 16155869777532.

The previous prime is 16155873796889. The next prime is 16155873796991. The reversal of 16155873796969 is 96969737855161.

The square root of 16155873796969 is 4019437.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 9811459905625 + 6344413891344 = 3132325^2 + 2518812^2 .

It is not a de Polignac number, because 16155873796969 - 2¹⁹ = 16155873272681 is a prime.

It is a super-2 number, since 2×16155873796969² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16155873796892 and 16155873796901.

It is not an unprimeable number, because it can be changed into a prime (16155873796999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2009719 + ... + 6029155.

It is an arithmetic number, because the mean of its divisors is an integer number (5385292605469).

Almost surely, 2^{16155873796969} is an apocalyptic number.

16155873796969 is the 4019437-th square number.

16155873796969 is the 2009719-th centered octagonal number.

It is an amenable number.

16155873796969 is a deficient number, since it is larger than the sum of its proper divisors (4019438).

16155873796969 is an frugal number, since it uses more digits than its factorization.

16155873796969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8038874 (or 4019437 counting only the distinct ones).

The product of its digits is 4629441600, while the sum is 82.

The spelling of 16155873796969 in words is "sixteen trillion, one hundred fifty-five billion, eight hundred seventy-three million, seven hundred ninety-six thousand, nine hundred sixty-nine".